It will just be limited to certain driver amount and features. If it exists, upload the data.acd file from the modded car to the directory that was just created on the. Make a new folder inside cars with the exact name of the modded car.
If you are not confident about our services, you can try out to create an event for free. To upload a modded car you have to do the following: Go to your control panel, click at your server, and then click at File Manager Then Click at content and then Cars. In the server menu, navigate to and select your desired server, or you can search for the server name manually at the top. Select Server List in the bottom-right section of the Multiplayer screen.